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Australia
Granny Smith Mine

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 Location:
27 km S from Laverton, Western Australia, Australia

  Address:
Mt Weld Road
Laverton
Western Australia, Australia
6440
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Overview

StageProduction
Mine TypeUnderground
Commodities
  • Gold
Mining Method
  • Longhole open stoping
  • Room-and-pillar
  • Paste backfill
Production Start...
Mine Life11 years (as of Jan 1, 2021)


Owners

Source: p. 373, 440
CompanyInterestOwnership
Gold Fields Ltd. 100 % Indirect
The Granny Smith Gold Mine (GSM) is owned by GSM Mining Company Pty Ltd a wholly owned subsidiary of Gold Fields Ltd.

Contractors

Subscription required - Subscription is required.


Deposit Type

  • Vein / narrow vein
  • Hydrothermal


Summary:

The Granny Smith region is dominated by the Mount Margaret Dome in the north-west and the Kirgella Dome in the south-east. These domes are flanked to the east and west by north-west to north striking shear zones with the central zone between the two domes dominated by north to north-north-east striking sigmoidal shear zones. These distinctly different strikes developed early in the tectonic evolution and resulted in favourable architecture for late-stage orogenic gold mineralisation at Wallaby and Granny Smith. Orogenic greenstone gold deposits are hosted in different styles of lodes. The lodes comprise vein stock works localised by a northerly trending shear at the margin of a granodiorite. The Wallaby lodes are flat-lying alteration zones hosted in magnetite amphibole altered conglomerates. Mineralised zones show moderate to long-range geological continuity and short-range grade continuity.


Mining Methods

  • Longhole open stoping
  • Room-and-pillar
  • Paste backfill


Summary:

Wallaby underground is accessed via a decline, and mining methods include room and pillar, bulk stopes and long-hole open stoping. The Zone 135 bulk stopes reflect the deepest mining in the LoM plan at Wallaby at ~1,450m below surface. Ground support, pillars and paste fill are designed to manage seismic activity. Operations utilise owner mining. Road haulage carts ore to the processing plant from the decline portal. The mine has one ore stockpile in the LoM plan. Mining of a second haulage decline from surface down to Zone 90 was completed in 2021 to improve haulage efficiency. Wallaby underground mine is accessed via a single truck haulage decline from a portal in the Wallaby open pit. Ramp gradient is 1:7, decline and truck access profile are 5.2m wide x 5.7m high and ore drive profile is 4.6m wide x 4.6m high. Granny Smith operates a single TSF that comprises three compartments, known as cells 1, 2 and 3. A fourth cell will be constructed in 2021 next to cell 3 to provide additional tailings capacity for the rest of the LoM. The mine also has one ore stockpile in the LoM plan.


Crushing and Grinding
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Processing

Source: Subscription required

Summary:

- subscription is required.


Production:

CommodityUnits2022202120202019201820172016
Gold koz  ......  Subscription required ^  ......  Subscription required  ......  Subscription required  ......  Subscription required280290284
All production numbers are expressed as metal in doré. ^ Guidance / Forecast.
Subscription required - Subscription is required.

Operational Metrics:

Metrics202120202019201820172016
Total tonnes mined  ......  Subscription required  ......  Subscription required2,342 kt2,322 kt2,227 kt2,042 kt
Ore tonnes mined  ......  Subscription required  ......  Subscription required1,712 kt1,755 kt1,699 kt1,518 kt
Waste  ......  Subscription required  ......  Subscription required631 kt567 kt528 kt523 kt
Tonnes processed  ......  Subscription required  ......  Subscription required1,753 kt1,778 kt1,726 kt1,446 kt
Annual processing capacity  ......  Subscription required  ......  Subscription required3.5 Mt3.5 Mt3.5 Mt
Subscription required - Subscription is required.

Reserves at December 31, 2021:
Mineral Resources cut-off for open pit 0.66 g/t;
Mineral Resources cut-off for underground 2.1 – 3.0 g/t;
Mineral Reserves cut-off for underground 2.6 – 3.5 g/t.

CategoryOreTypeTonnage CommodityGradeContained Metal
Proven Stockpiles 26 kt Gold 5.55 g/t 5 koz
Proven In-Situ (UG) 2,212 kt Gold 4.93 g/t 351 koz
Proven Total 2,239 kt Gold 4.94 g/t 355 koz
Probable In-Situ (UG) 10,363 kt Gold 5.58 g/t 1,861 koz
Proven & Probable Stockpiles 26 kt Gold 5.55 g/t 5 koz
Proven & Probable In-Situ (UG) 12,575 kt Gold 5.47 g/t 2,211 koz
Proven & Probable Total 12,601 kt Gold 5.47 g/t 2,216 koz
Measured Stockpiles 26 kt Gold 5.55 g/t 5 koz
Measured In-Situ (UG) 5,472 kt Gold 6.03 g/t 1,061 koz
Measured Total 5,498 kt Gold 6.03 g/t 1,066 koz
Indicated In-Situ (UG) 27,934 kt Gold 5.88 g/t 5,279 koz
Inferred In-Situ (OP) 357 kt Gold 1.88 g/t 22 koz
Inferred In-Situ (UG) 10,663 kt Gold 5.06 g/t 1,735 koz
Inferred Total 11,020 kt Gold 4.96 g/t 1,757 koz
Total Resource Stockpiles 26 kt Gold 5.55 g/t 5 koz
Total Resource In-Situ (OP) 357 kt Gold 1.88 g/t 22 koz
Total Resource In-Situ (UG) 44,069 kt Gold 5.7 g/t 8,076 koz
Total Resource Total 44,452 kt Gold 5.67 g/t 8,102 koz

Commodity Production Costs:

CommodityUnits2022202120202019201820172016
All-in sustaining costs (sold) Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 925 / oz†   896 / oz†   834 / oz†  
All-in costs Gold USD  ......  Subscription required ^†  ......  Subscription required†  ......  Subscription required†  ......  Subscription required† 925 / oz†   896 / oz†   834 / oz†  
^ Guidance / Forecast.
† Net of By-Product.
Subscription required - Subscription is required.

Financials:

Units2022202120202019201820172016
Capital expenditures (planned) M USD  ......  Subscription required
Growth Capital M USD  ......  Subscription required  ......  Subscription required
Sustaining costs M USD  ......  Subscription required  ......  Subscription required 79   87   90.3  
Capital expenditures M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 79   87   90.3  
Revenue M USD  ......  Subscription required  ......  Subscription required  ......  Subscription required 355   363.8   355.8  
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Heavy Mobile Equipment:
HME TypeModelSizeLeased or
Contractor
Ref. Date
Excavator 30 t Leased May 15, 2020
Grader ....................... Subscription required Leased May 15, 2020
Loader (FEL) Leased May 15, 2020
Tipper truck 140 t Leased May 15, 2020
Truck (dump) ....................... Subscription required 160 t Leased May 15, 2020
Truck (dump) Leased May 15, 2020
Truck (underground) ....................... Subscription required 65 t Oct 5, 2022
Truck (water) Leased May 15, 2020
Subscription required - Subscription is required.

Mine Management:

Job TitleNamePhoneEmailProfileRef. Date
....................... Subscription required ....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 12, 2022
....................... Subscription required ....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2022
....................... Subscription required ....................... Subscription required Subscription required Apr 7, 2022
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Staff:

EmployeesTotal WorkforceYear
Subscription required 2021
Subscription required 2020
Subscription required 2019
Subscription required 2018
Subscription required 2017
Subscription required 2016

Corporate Filings & Presentations:

DocumentYear
Other 2022
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2021
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2020
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
................................... Subscription required 2019
Form 20-F 2018
Year-end Mineral Reserves 2018
Form 20-F 2017
Year-end Mineral Reserves 2017
Annual Report 2016
Financial Review 2016
Year-end Mineral Reserves 2016
Financial Review 2015
Year-end Mineral Reserves 2015
Corporate Presentation 2014
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